India, Jan. 16 -- The human mouth primarily functions with the help of the temporomandibular joints, or the TMJs. These are complex sliding hinge joints on both sides of the face that connect the lower jaw to the skull. The movement of this joint helps us to open and close our mouths.

There are some medical conditions in which the mouth may be locked tightly in place and refuse to open or close. In case the mouth is tightly open and refuses to close, the jaw lock condition is often called trismus, revealed Dr Kunal Sood, a Maryland-based physician in Anesthesiology and Interventional Pain Medicine.

Taking to Instagram on January 16, Dr Sood elaborated on the condition, while also stating the best way to deal with it on our own.

Trismus...